San Ignacio weather in May

In May, San Ignacio sees average daytime highs of 34°C and overnight lows near 24°C, with 89 mm of rain across 13.9 wet days and about 12.8 hours of daylight. It is the 1st-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of May to 12 h 54 min by month's end. Set against the rest of the year, May is San Ignacio's 6th-clearest and 3rd-windiest month. For the whole year in context, see San Ignacio's year-round climate.

Daytime high
34°
1st warmest
Overnight low
24°
11th coldest
Rainfall
89 mm
13.9 wet days
Daylight
12 h 48 min
5:28 AM – 6:17 PM
Cloud cover
59%
6th clearest
Wind
10 km/h
3rd windiest
Solar energy
5.76 kWh/m²
Travel score
2.8
out of 10

San Ignacio is capital of the Cayo district.

Density
2,104/km²
people per km²
Founded
1800

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 34°C through the month.

A typical May day in San Ignacio reaches about 34°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 36°C. Set against its neighbours, May runs on par with April and about 2°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13423
23423
33423
43423
53423
63423
73423
83423
93423
103423
113423
123423
133423
143423
153423
163424
173424
183424
193424
203424
213424
223424
233324
243324
253324
263324
273324
283324
293324
303324
313324

How May really feels in San Ignacio

Once humidity and wind are folded in, May averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

San Ignacio weather by month

How May compares with the rest of the year at a glance. May is the 1st-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 19°501311.16.0
Feb29° / 19°308.911.45.5
Mar32° / 20°338.211.94.5
Apr34° / 22°387.312.43.5
May34° / 24°8913.912.82.8
Jun32° / 24°15122.7132.7
Jul32° / 23°9821.412.93.0
Aug33° / 23°11220.412.62.7
Sep32° / 23°14523.712.12.5
Oct30° / 22°14821.611.63.4
Nov29° / 20°9815.611.24.9
Dec28° / 19°5713.6115.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 22% of May, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16436
26436
36337
46238
56238
66139
76139
86139
96040
106040
115941
125842
135743
145644
155545
165347
175248
185149
195050
204951
214852
224654
234555
244456
254159
263961
273961
283763
293664
303466
313367

Chance of precipitation in May

Any precipitation

San Ignacio gets around 89 mm of rain over 13.9 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 46% and peaks near 69% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
129
230
330
431
532
633
735
836
937
1038
1140
1241
1342
1443
1545
1646
1747
1848
1949
2050
2152
2253
2354
2456
2558
2660
2762
2863
2965
3067
3169

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the oppressive band about 70% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1120709
2119719
3118729
4117739
51177210
61167310
71157410
81157410
91147510
101147510
111147411
121147411
131137412
141137412
151137313
161127314
171127314
181117315
191107316
201107118
21197119
22197020
23186922
24186724
25176626
26166528
27166330
28056332
29046234
30046036
31035938

Wind in May

Winds average 10 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 36 min at the start of May to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over May. Sunrise moves from 5:35 AM to 5:25 AM, and sunset from 6:12 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:356:12
212.65:356:12
312.65:346:12
412.75:346:13
512.75:336:13
612.75:336:13
712.75:326:14
812.75:326:14
912.75:316:14
1012.75:316:15
1112.75:306:15
1212.85:306:15
1312.85:306:16
1412.85:296:16
1512.85:296:16
1612.85:286:17
1712.85:286:17
1812.85:286:17
1912.85:286:18
2012.85:276:18
2112.95:276:18
2212.95:276:19
2312.95:276:19
2412.95:266:19
2512.95:266:20
2612.95:266:20
2712.95:266:20
2812.95:266:21
2912.95:266:21
3012.95:266:22
3112.95:256:22

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.76 kWh/m².

For context, solar energy here swings from a low near 3.62 kWh/m² to a high of 6.02 kWh/m² in April across the year — May's 5.76 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.0Intense
46.0Intense
56.0Intense
66.0Intense
76.0Bright
86.0Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.7Bright
195.7Bright
205.7Bright
215.6Bright
225.6Bright
235.6Bright
245.5Bright
255.5Bright
265.5Bright
275.4Bright
285.4Bright
295.4Bright
305.3Bright
315.3Bright
Planning a trip in May

Is May a good time to visit San Ignacio?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.8
Sightseeing
9th-best month of the year
5.5
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in San Ignacio.

What to pack for San Ignacio in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, San Ignacio sees daytime highs around 34°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.

light clothesrain gearsun protection

UV index in San Ignacio in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Ignacio peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 10UV 13Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr13Extreme
May10Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in San Ignacio in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in San Ignacio is worst in May — around 30 µg/m³ PM2.5 (moderate), about 5.2× the cleanest month (December, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1529 µg/m³Dec 186 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar10Good
Apr28Moderate
May30Moderate
Jun26Moderate
Jul28Moderate
Aug19Moderate
Sep14Moderate
Oct10Good
Nov7Good
Dec6Good
Location & terrain

Where is San Ignacio?

San Ignacio sits at 17.2°N, 89.1°W, 0 m above sea level, in Belize. The nearest listed city is Melchor de Mencos, 14 km away.

BelmopanCrooked TreeHopkinsDangriga

Topography around San Ignacio

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Ignacio.

Within 3 km, the terrain around San Ignacio has only modest variations in elevation — a maximum elevation change of 131 m around an average of 92 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 451 m; within 80 km, large variations in elevation — a maximum elevation change of 1,118 m.

The land around San Ignacio is covered by trees (55%) and grassland (24%) within 3 km, trees (66%) and grassland (29%) within 16 km, and trees (79%) within 80 km.

3 km
131 m
16 km
451 m
80 km
1,118 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Melchor de Mencos 14 km · Belmopan 34 km · Crooked Tree 89 km · Hopkins 90 km · Dangriga 91 km · Flores 92 km · San Benito 94 km · Poptún 99 km

Belize travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / G
110 / 220 V · 60 Hz
Prices
≈ 53% of US
price level, 2025
GDP per capita
$7,865
2025
Happiness
6.7 / 10
World Happiness, 2025
Homicide rate
28.1
per 100k, 2022
Road deaths
22.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
Religion
Roman Catholic 40%Protestant 32%none 16%other 11%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for San Ignacio (17.1588°, -89.0696°, elevation 0 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).